Postbox Alternatives & Competitors

Thunderbird is a free email application that's easy to set up and customize - and it's loaded with great features!

Key Thunderbird features:

Free and Open Source Customization Cross-Platform Robust Security

Mailbird is the best email client for Windows 7, 8 and 10.

Key Mailbird features:

User-Friendly Interface Integration with Third-Party Apps Speed and Performance Unified Inbox

Real-time, open-time content for email: countdown timers, dynamic images, live product picks, geo-targeted maps, one-click surveys, and scratch-card rewards. No code, no ESP integration, rendered fresh every time someone opens.

Key Alterable features:

Countdown Timers Dynamic Images Dynamic Products Local Maps

Visit website freemium

eM Client is a fully-featured email client for Windows and macOS with a clean and easy-to-use interface. eM Client also offers features for calendars, tasks, contacts, notes, and chat. .

Key eM Client features:

Email Calendar Task management Events

freemium

Organize your world. Outlook’s email and calendar tools help you communicate, stay on top of what matters, and get things done.

Key Microsoft Outlook features:

Integration with Microsoft Ecosystem Calendar and Task Management Strong Security Features Customizable Interface

Secure email with absolutely no compromises. Get your free encrypted email account today.

Key ProtonMail features:

End-to-End Encryption Zero Access to User Data Swiss Privacy Laws Open Source

freemium €5 / Monthly (user - 5 GB)

There’s big news attached.

Key Apple Mail features:

Integration with Apple Ecosystem User Interface Privacy and Security Customizable Mail Rules

Mailspring is a mail client for Mac, Windows and Linux.

Key Mailspring features:

User Interface Unified Inbox Advanced Search Customization

Open Source

Zoho Mail is a secure, encrypted, and enterprise-ready email solution, a suite of apps tailor-made for your organization's needs. .

Key Zoho Mail features:

Easy to Set-up and use Free Trial Forever Free Plan Available Clean UI

freemium $1 / Monthly (per user)

Airmail is a lightweight and lightning fast mail client for Mac.

Key Airmail features:

Customizable Interface Integration with Other Apps Unified Inbox Advanced Filtering and Search

Gmail is available across all your devices Android, iOS, and desktop devices. Sort, collaborate or call a friend without leaving your inbox.

Key Gmail features:

Generous Storage Integration with Google Services Powerful Search Functionality Spam and Virus Protection

Apps/Evolution - GNOME Wiki!

Key Evolution features:

Feature-Rich Integrations Open Source Supports Multiple Email Protocols

The platform for exceptional customer service at scale.

Key Front features:

Unified Inbox Collaboration Integrations Automation

Spark helps you take your inbox under control. Instantly see what’s important and quickly clean up the rest. Spark for Teams allows you to create, discuss, and share email with your colleagues.

Key Spark Mail features:

Smart Inbox Collaborative Email Customization Unified Inbox

Open Source